We divide 658223 by 91
The aim is to understand the frequency of 91 in 658223.

On to step 1:
The number 91 fits into 6 0 times, leaving a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Include the next digit (5) from the dividend after 6, then repeat: 65 / 91

On to step 2:
65 divided by 91 is 0 with a remainder of 65.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 65, we end up with 65.
Include the next digit (8) from the dividend after 65, then repeat: 658 / 91

On to step 3:
91 can be fit into 658 7 times, resulting in a remainder of 21.
Use 7 as the next digit of our solution. 
Result so far: 7.0
Subtract 637 from 658 to get 21.
Bring next digit (2) of the dividend behind the 21 and repeat the process: 212 / 91

Moving on to step 4:
91 can be fit into 212 2 times, resulting in a remainder of 30.
Record the quotient 2 as the next digit in the result. 
Result so far: 72.0
Deduct 182 from 212 and we're left with 30.
Grab the next digit (2) from the dividend, add it to 30, then carry on: 302 / 91

On to step 5:
91 can be fit into 302 3 times, resulting in a remainder of 29.
Record the quotient 3 as the next digit in the result. 
Result so far: 723.0
If we take 273 away from 302, we end up with 29.
Take the next digit (3) from the dividend and append it to 29, then repeat: 293 / 91

Going ahead to step 6:
When dividing 293 by 91, we get 3 with a remainder of 20.
Write down 3 as next digit of the result. 
Result so far: 7233.0
Deduct 273 from 293 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 7:
If we divide 200 by 91, we get 2 and a remainder of 18.
Write down 2 as next digit of the result. 
Result so far: 7233.2
If we take 182 away from 200, we end up with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Moving on to step 8:
When dividing 180 by 91, we get 1 with a remainder of 89.
Write down 1 as next digit of the result. 
Result so far: 7233.21
Deduct 91 from 180 and we're left with 89.
Since there are no more digits in the dividend, we add a zero to the remainder making it 890, and continue the process.

On to step 9:
91 can be fit into 890 9 times, resulting in a remainder of 71.
Write down 9 as next digit of the result. 
Result so far: 7233.219
Subtract 819 from 890 to get 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

Going ahead to step 10:
When dividing 710 by 91, we get 7 with a remainder of 73.
The number 7 becomes the next digit in our result. 
Result so far: 7233.2197
Subtract 637 from 710 to get 73.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

Moving on to step 11:
If we divide 730 by 91, we get 8 and a remainder of 2.
Put 8 as the next digit of the answer. 
Result so far: 7233.21978
Subtracting 728 from 730 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 12:
20 divided by 91 is 0 with a remainder of 20.
The next digit of our result is 0. 
Result so far: 7233.21978
Deduct 0 from 20 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 13:
If we divide 200 by 91, we get 2 and a remainder of 18.
The next digit of our result is 2. 
Result so far: 7233.2197802
If we subtract 182 from 200, we get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Going ahead to step 14:
180 divided by 91 is 1 with a remainder of 89.
Record the quotient 1 as the next digit in the result. 
Result so far: 7233.21978021
Deduct 91 from 180 and we're left with 89.
Since there are no more digits in the dividend, we add a zero to the remainder making it 890, and continue the process.

The final outcome is 7233.21978021, with a leftover of 8.9e-08.